How is JDBC related to JAVA?

Answer 1

JDBC stands for Java DataBase Connectivity and is an API witch which you can access (connect, create, insert, read, update, delete, query) a database.

Answer 2

If you want to connect to a SQL database, it is enough to download and install Java SE.
If you want to connect to another database, download the corresponding driver.
Here is a tutorial to get started after installation:
https://docs.oracle.com/javase/tutorial/jdbc/overview/

Answer 3

how?